noob setting up plexpi

I'm completely new to raspberry pi/Plexpi and have no idea what I'm doing. So far I put the image on my pi and it boots up fine. the pi is plugged in via ethernet and when I go to http://plexpi.local:32400/web it says "plexpi.local’s server IP address could not be found."

Is there somewhere that I can read discrete instructions or could someone maybe help me out